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[rtl-433.git] / src / devices / esperanza_ews.c

diff --git a/src/devices/esperanza_ews.c b/src/devices/esperanza_ews.c
new file mode 100644 (file)
index 0000000..0ab38fa
--- /dev/null
+++ b/src/devices/esperanza_ews.c
@@ -0,0 +1,126 @@
+#include <bitbuffer.h>
+#include "util.h"
+#include "data.h"
+#include "rtl_433.h"
+
+
+/*
+    Esperanza EWS-103 sensor on 433.92Mhz
+
+    Copyright (C) 2015 Alberts Saulitis
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License version 3 as
+    published by the Free Software Foundation.
+*/
+
+/*
+    No frame description was available on the internet therefore it was required
+    to reverse engineer it.
+    0        1        2        3        4        5
+    AAAABBBB ????CCTT TTTTTTTT TTHHHHHH HH?????? ??
+
+    A - Preamble
+    B - Rolling device ID
+    C - Channel (1-3)
+    T - Temperature (Little-endian)
+    H - Humidity (Little-endian)
+    ? - Unknown
+*/
+
+/*
+   Sample Data:
+    Esperanze EWS: TemperatureF=55.5 TemperatureC=13.1 Humidity=74 Device_id=0 Channel=1
+
+    *** signal_start = 16189, signal_end = 262145
+    signal_len = 245956,  pulses = 266
+    Iteration 1. t: 142    min: 141 (37)    max: 143 (229)    delta 4
+    Iteration 2. t: 142    min: 141 (2)    max: 143 (264)    delta 0
+    Distance coding: Pulse length 142
+
+    Short distance: 487, long distance: 964, packet distance: 1920
+
+    p_limit: 142
+    bitbuffer:: Number of rows: 14
+    [00] {0} :
+    [01] {0} :
+    [02] {42} 00 53 e5 69 02 00 : 00000000 01010011 11100101 01101001 00000010 00
+    [03] {0} :
+    [04] {42} 00 53 e5 69 02 00 : 00000000 01010011 11100101 01101001 00000010 00
+    [05] {0} :
+    [06] {42} 00 53 e5 69 02 00 : 00000000 01010011 11100101 01101001 00000010 00
+    [07] {0} :
+    [08] {42} 00 53 e5 69 02 00 : 00000000 01010011 11100101 01101001 00000010 00
+    [09] {0} :
+    [10] {42} 00 53 e5 69 02 00 : 00000000 01010011 11100101 01101001 00000010 00
+    [11] {0} :
+    [12] {42} 00 53 e5 69 02 00 : 00000000 01010011 11100101 01101001 00000010 00
+    [13] {0} :
+    Test mode file issued 4 packets
+*/
+
+static int esperanza_ews_process_row(const bitbuffer_t *bitbuffer, int row)
+{
+    const uint8_t *b = bitbuffer->bb[row];
+    uint8_t humidity;
+    uint16_t temperature_with_offset;
+    uint8_t device_id;
+    uint8_t channel;
+    float temperature_f;
+
+    data_t *data;
+
+    char time_str[LOCAL_TIME_BUFLEN];
+
+    local_time_str(0, time_str);
+
+    humidity = (uint8_t)((b[3] << 6) | ((b[4] >> 2) & 0x0F) | ((b[3] >>2) & 0xF));
+    temperature_with_offset = (uint16_t)(((b[2] << 10) | ((b[3] << 2) & 0x300) | ((b[3] << 2) & 0xF0) | ((b[1] << 2) & 0x0C) |  b[2] >> 6) & 0x0FFF);
+    device_id = (uint8_t)(b[0] & 0x0F);
+    channel = (uint8_t)((b[1] & 0x0C)+1);
+    temperature_f = (float)((temperature_with_offset-900)/10.0);
+
+    data = data_make("time",          "",            DATA_STRING, time_str,
+                     "model",         "",            DATA_STRING, "Esperanza EWS",
+                     "id",            "",            DATA_INT, device_id,
+                     "channel",       "Channel",     DATA_INT, channel,
+                     "temperature_F", "Temperature", DATA_FORMAT, "%.02f F", DATA_DOUBLE, temperature_f,
+                     "humidity",      "Humidity",    DATA_FORMAT, "%u %%", DATA_INT, humidity,
+                      NULL);
+    data_acquired_handler(data);
+
+    return 1;
+}
+
+static char *output_fields[] = {
+    "time",
+    "model",
+    "id",
+    "channel",
+    "temperature_F",
+    "humidity",
+    NULL
+};
+
+static int esperanza_ews_callback(bitbuffer_t *bitbuffer)
+{
+    if (bitbuffer->num_rows == 14) {
+        for (int row=2; row < bitbuffer->num_rows-3; row+=2) {
+            if (memcmp(bitbuffer->bb[row], bitbuffer->bb[row+2], sizeof(bitbuffer->bb[row])) != 0 || bitbuffer->bits_per_row[row] != 42) return 0;
+        }
+        esperanza_ews_process_row(bitbuffer, 2);
+        return 1;
+    }
+    return 0;
+}
+
+
+r_device esperanza_ews = {
+        .name          = "Esperanza EWS",
+        .modulation    = OOK_PULSE_PPM_RAW,
+        .short_limit   = 2800,
+        .long_limit    = 4400,
+        .reset_limit   = 8000,
+        .json_callback = &esperanza_ews_callback,
+        .disabled      = 0,
+        .demod_arg     = 0,
+};